Surf Forecasts:
Kohala Lighthouse surf forecast from 15 Aug 2026:
- Best quality surf: Sunday 16 Aug, 5AM (local time) - 8ft (2.5m), 9s period, E swell with glassy winds.
- Most powerful swell: Saturday 15 Aug, 8PM (local time) - 21ft (6.5m), 11s period, E swell with 9,195 kJ wave energy.
- Next surfable swell (1★+): Sunday 16 Aug, 5AM (local time) - 8ft (2.5m), 9s period with E swell.
Best Forecast Surf Conditions for Kohala Lighthouse this week:
The surf forecast for Kohala Lighthouse over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Sunday (Aug 16) at 5AM. The primary swell is predicted to be 2.5m and 9s period. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Kohala Lighthouse in the next 16 days are 6.5m 11s and forecast to arrive on Saturday (Aug 15) at 8PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 10s period and expected on Sunday (Aug 16) at 2AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5AM (Sun 16th Aug) | 8ft (2.5m) 9s |
| Best Surf | 5AM (Sun 16th Aug) | 8ft (2.5m) 9s |
| Most Powerful | 8PM (Sat 15th Aug) | 21ft (6.5m) 11s |
Table - best surf conditions forecast for Kohala Lighthouse over the next 16 days.
The Lowdown
Alright, so right now, it’s pretty ugly here for the next week and a half. We’ve got a solid, consistent reef at Kohala Lighthouse (Hawaii), and it’s an exposed, advanced spot that likes a northerly swell. But the forecast is just hammering us with cross-shore winds and messy, lumpy conditions for days.
For Saturday the 15th, we’re looking at a severe gale with 50 mph cross-shore winds and a huge, chaotic 20-foot east swell—that’s well over 8 feet and only for experts, but honestly, with that wind, it’s unsurfable. The combined swell energy is a massive 7211 and the period is a long 10 seconds, but with gale-force cross-shore it’s just a washing machine.
Sunday the 16th morning is the first time we get a bit of a breather, with a 8-foot east swell at 8 seconds. The wind drops to just 3 mph, almost glassy, but it’s cross-shore, so we’re still dealing with a light cross-chop. The energy is moderate at 1336. Still, this is the best we’re going to see for a while, though the score is marginal. It’s a small window of slightly cleaner surf, but the direction is east, not the ideal north swell.
From Monday the 17th right through to Saturday the 23rd of August, it’s just poor surf conditions every day. Swell hangs around 4 to 6 feet, but the period drops to a short 6 to 8 seconds, and the wind stays a fresh 15 to 21 mph cross-shore, creating a lumpy, cross-chop. The energy is weak to moderate, barely cracking 300 in places. Not much to get excited about.
Then from Sunday the 24th up to Wednesday the 27th of August, things stay poor. Swell is small—3 to 5 feet—but the wind is still fresh and cross-shore or cross-onshore. The combined energy is in the weak-to-moderate range (117 to 380). Honestly, this stretch looks more interesting for kite surfing than paddle surfing.
Now, there is a flicker of hope way out at the end. On Thursday the 27th of August morning, we start seeing a long-period groundswell creeping in from the east at 17 seconds, with 5 to 5 feet of swell. The energy jumps up to 1318, which is moderate. But the wind is still a fresh 18 mph cross-shore. It’s marginal. This trend continues into Friday the 28th and Saturday the 29th of August, with the swell building to 6 feet and the period holding at 16 to 17 seconds. Energy is getting strong—over 2000. Still, that cross-shore wind is the killer.
Finally, on Sunday the 30th of August morning, we get a bigger pulse: 10 feet east-northeast swell with a very long 15-second period. The combined energy is a strong 3857. The rating improves to a 2 out of 10, so it’s at least marginal now, not just poor. But again, cross-shore wind at 18 mph—that’s still a fresh breeze and lumpy. This long-period swell would be incredible if the wind cooperated, but it’s just not lining up. For a reef like Kohala Lighthouse, that long period and big size could produce some grinding waves, but with the wind so wrong, it’s a tease.
So, the standout, if you can call it that, is the Sunday the 16th morning session—glassiest wind of the whole period, 8-foot east swell, and the most relaxed vibe. For the second week, the 27th through the 30th has the biggest, longest-period swell, but those cross-shore winds will keep it from being truly clean. It’s promising, but less certain.
Rusty
Short Range ForecastHeavy rain (total 63mm), heaviest during Sat night. Warm (max 28°C on Sun morning, min 25°C on Fri night). Mainly severe gales. | Days 5-7 Weather SummaryMostly dry. Warm (max 26°C on Tue morning, min 24°C on Mon night). Mainly fresh winds. | ||||||||||||||||||
Saturday 15 | Sunday 16 | Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | ||||||||||||||
Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map | |||||||||||||||||||
Wave Height (m) Direction Period (s) | ENE 12 | E 10 | E 10 | E 9 | E 8 | E 8 | ENE 8 | ENE 7 | ENE 6 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 7 | ENE 7 | ENE 7 | NNE 7 |
Wave Graph | |||||||||||||||||||
3588 | 3669 | 7201 | 1797 | 720 | 684 | 426 | 330 | 213 | 220 | 221 | 232 | 206 | 238 | 237 | 164 | 164 | 146 | 51 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross | cross | cross-off | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross-on | cross-on | cross |
High Tide | 4:51AM0.61m | 4:48PM0.74m | 5:39AM0.63m | 5:07PM0.65m | 6:32AM0.63m | 5:18PM0.57m | 7:38AM0.63m | 5:07PM0.51m | 9:12AM0.63m | 10:57AM0.66m | |||||||||
Low Tide | 10:57PM0.15m | 10:31AM0.22m | 11:22PM0.15m | 11:17AM0.31m | 11:46PM0.15m | 12:09PM0.39m | 00:11AM0.16m | 1:29PM0.47m | 00:40AM0.18m | 1:22AM0.20m | 2:39AM0.22m | ||||||||
— | 6:01 | — | — | 6:03 | — | — | 6:03 | — | — | 6:03 | — | — | 6:03 | — | — | 6:03 | — | — | |
6:52 | — | 6:52 | — | — | 6:51 | — | — | 6:51 | — | — | 6:50 | — | — | 6:49 | — | — | 6:47 | — | |
mm | 15 | 7 | 9 | 28 | — | 3 | 1 | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 25 | 26 | 25 | 27 | 28 | 27 | 27 | 26 | 25 | 25 | 26 | 26 | 25 | 26 | 26 | 26 | 26 | 26 | 25 |
Feels °C | 22 | 18 | 17 | 32 | 32 | 29 | 30 | 25 | 23 | 23 | 24 | 24 | 23 | 26 | 25 | 26 | 28 | 27 | 26 |
Swell 1 Height (m) Direction Period (s) | W 12 | W 11 | W 11 | SW 10 | ENE 8 | W 12 | W 12 | W 11 | W 11 | W 11 | W 11 | W 13 | W 13 | W 12 | W 12 | NNE 6 | SSW 18 | SSW 17 | NNE 7 |
11 | 9 | 10 | 24 | 603 | 26 | 11 | 10 | 10 | 10 | 10 | 14 | 30 | 25 | 25 | 16 | 30 | 29 | 40 | |
Swell 2 Height (m) Direction Period (s) | — | W 15 | — | W 13 | SW 6 | SW 6 | SW 5 | N 8 | N 8 | N 7 | SW 17 | W 11 | W 7 | N 7 | SW 16 | W 11 | W 11 | W 11 | ENE 7 |
— | 4 | — | 13 | 6 | 5 | 1 | 1 | 1 | 1 | 11 | 9 | 4 | 4 | 10 | 10 | 9 | 9 | 48 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | SW 16 | W 13 | N 9 | N 8 | SW 18 | SW 19 | W 14 | N 7 | SW 18 | SW 18 | SW 16 | W 6 | SW 16 | SW 8 | SW 8 | E 8 |
— | — | — | 10 | 13 | 2 | 1 | 12 | 15 | 4 | 1 | 12 | 12 | 10 | 1 | 10 | 3 | 2 | 51 | |
Wind waves Height (m) Direction Period (s) | ENE 12 | E 10 | E 10 | E 9 | E 8 | E 8 | ENE 8 | ENE 7 | ENE 6 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 7 | ENE 7 | ENE 7 | — |
3588 | 3669 | 7201 | 1797 | 720 | 684 | 426 | 330 | 213 | 220 | 221 | 232 | 206 | 238 | 237 | 164 | 164 | 146 | — | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 57 | 57 | 74 | 25 | 10 | 5 | 73 | 73 | 73 | 73 | 73 | 73 | 71 | 25 | 25 | 36 | 25 | 71 | 5 |
Best forecast wave conditions in Big Island | |||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||
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Information about the Kohala Lighthouse Surf forecast
The above surf forecast table for Kohala Lighthouse provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Kohala Lighthouse can be found by selecting the local surf guide option on the grey menu. Our Kohala Lighthouse surf forecast is unique since it includes wave energy (power) that defines the real feel of the surf rather than just the height or the period. If you surf the same spot (Kohala Lighthouse) regularly then make a mental note of the wave energy from the surf forecast table each time you go. Very soon you may start to choose your surf days based on the wave energy alone combined with our forecast of favourable offshore wind conditions. Our star ratings will help here and of course you will also find the usual wave height and period predictions on our surf forecasts as well as a full break down of the swell components under our advanced users option (to reveal that, click the little Einstein character under the tide times).
Further information to help with frequently asked questions about our surf forecast for Kohala Lighthouse may be found under the help tab on the top menu and also by moving your mouse over the question marks on the surf forecast table itself. Please always bear in mind that the forecast is for near-shore open water and local factors at each surf break influence the actual breaking wave height, such as the beach / reef profile, water depths offshore and shelter.
Kohala Lighthouse is 87 km (54 miles) from Kihei. If you plan a vacation in Big Island, look for hotels and other accommodation in Kihei. Kihei has rooms for a wide range of budgets as well as car hire and transport links.











